Despite previous reports of no apparent photorespiration in C. , plants based on measurements of gas exchange under 2 versus 21% O, at varying [CO,], photosynthesis in maize (Zea mays) shows a dual response to varying [O,]. l h e maximum rate of photosynthesis in maize i s dependent on 0, (approximately 10Y0). lhis O2 dependence is not related to stomatal conductance, because measurements were...

Carbon monoxide, produced in the Venus atmosphere by photolysis of C02, is removed mainly by reaction with OH. The radical OH is formed in part by photolysis of H 20., in part by reaction of 0 with H02 • Photolysis of HCl provides a major source of H radicals near the visible clouds of Venus and plays a major role in the overall photochemistry. The mixing ratio of 0 2 is estimated to be approxi...

1.0 INTRODUCTION 2. 0 MODULATOR CONFIGURATION AND CHARACTERISTICS 3. 0 LOW PRESSURE CW C02 LASER EXPERIMENTS 4. 0 MODE-LOCKING THE C02 TEA LASER 4. I Linewidth of CO TEA Lasers 4. 2 Experimental Configuration and Initial Experiments 4. 3 Measurements of the Optical Quality of the Laser Medium 4. 4 Modifications of the Discharge Configuration to Improve Medium Optical Quality 4. 5 Phase-Locking ...

The visual effects of repeated exposure to carbon dioxide (C02) at levels commonly regarded as innocuous were investigated. Exposure to C02 varied cyclically from .03 (air) to 3.0%, at one atmosphere pressure, every 24 hours for a period of six days. A battery of visual tests was administered during this period and in control periods both before and after the exposure to carbon dioxide. Among t...

Experimental approaches attempt to determine the routes by which crustal carbonatite magmas can be derived from C02-bearing peridotite at high pressures. The intimate association of kimberlite and carbonatite on a small scale il· lustrates links in the processes. Carbonation of peridotite by C02 can cause the generation of near-solidus carbonatitic liquid from mantle peridotite at depths greate...

Wyllie , P. J . 1984 T he effect of carbon dioxide on phase relationships for synthetic lhe rzo lite and harzburgite. In : FL J. Zwart , P. Hartma n & A. C. Tobi (eds): Ophioli tes a nd ultramafic rocks a tribute to Emile den Tex Geol. Mijnbouw 63:213-2 19. T he system Ca0-Mg0-Si0 2 -C02 includes mineral assemblages corresponding to model lhe rzolite: fors te rite(Fo) + orthopyroxene(Opx) + cli...